12^2 - 11^2
= 144 - 121
= 23
square root (23) = 4.79 = 4.8
answer
C. 4.8
Answer:
2.81
Step-by-step explanation:
.81 has a bar over it.
Took 3 of us in grade 10 but johns present age is 77.5 and his sister is 72.5
R/9 = -21
Multiply by 9
r = -189
A = 2lw + 2lh + 2hw
A = 2(12)(3) + 2(12)(5) + 2(5)(3)
A = 72 + 120 + 30
A = 222 cm squared
Hope this helps!! :)